In a Medium Bowl combine Ground Chuck, Salt and Pepper, loosely mix together with hands trying not to press to much together (This makes a tough burger). Preheat griddle on medium high heat. Take about 1/4 cup of the meat and shape into a ball, press in about 1 tsp onion in one side, cook onion side up first for about 4-5 minutes then flip, Slice Roll in half and place on top of the meat and add cheese of your choice continue cooking for 2-3 minutes